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Diacodexis secans

Mammalia - Artiodactyla - Diacodexeidae

Taxonomy
Pantolestes secans was named by Cope (1881). Its type specimen is AMNH 4899, a set of teeth (left and right P4 - M3), and it is a 3D body fossil. It is the type species of Pantolestes.

It was recombined as Trigonolestes secans by Matthew (1899); it was recombined as Diacodexis secans by Cope (1882), Sinclair (1914), Guthrie (1971), Krishtalka and Stucky (1985), Stucky (1998), Thewissen et al. (2001) and Theodor et al. (2007).

Synonyms
Synonymy list
YearName and author
1881Pantolestes secans Cope p. 187
1882Diacodexis secans Cope
1882Phenacodus laticuneus Cope p. 181
1882Mioclaenus brachystomus Cope pp. 187-188
1883Diacodexis laticuneus Cope
1884Diacodexis laticuneus Cope
1884Pantolestes brachystomus Cope
1894Trigonolestes brachystomus Cope
1899Hyopsodus laticuneus Matthew
1899Trigonolestes brachystomus Matthew
1899Trigonolestes secans Matthew
1914Diacodexis laticuneus Sinclair
1914Diacodexis olseni Sinclair
1914Diacodexis secans Sinclair
1971Diacodexis secans Guthrie
1985Diacodexis secans Krishtalka and Stucky
1998Diacodexis secans Stucky
2001Diacodexis secans Thewissen et al. p. suppl.
2007Diacodexis secans Theodor et al. p. 40

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
RankNameAuthor
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
orderArtiodactyla()
familyDiacodexeidae
genusDiacodexis
speciessecans()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
L. Krishtalka and R. K. Stucky 1985Larger than all penecontemporaneous species of Dia- codexis and more robust than D. gracilis, D. minutus and Artiodactyla sp. A and sp. B, with more inflated molar protocones, metaconids and hypoconids. Additionally, differs from D. gracilis in having a less re- duced and less medial paraconid on M1_3, and more nearly square M1_2; M1_3 talonids more shallow and cusps more bunodont than in Artiodactyla sp. A and sp. B and D. minutus; M1_3 metaconids less inflated in proportion to tooth size than in D. woltonensis; M 1_ 3 para- conids and paracristids more developed than in Artiodactyla sp. A and sp. B, paraconids and metaconids less elevated, entoconid lower than hypoconid and hypoconulid not lingually placed near entoconid.